The two men met at an apartment in unincorporated Redwood City,
and when Sanchez delivered the marijuana, he was robbed at gunpoint by
Martinez and two other suspects, police said.

The suspects tied the victim up and left him in the apartment
while they loaded the marijuana into a vehicle and left, according to police.

However, shortly afterward the suspects abandoned their vehicle
and left the area while leaving the marijuana in the vehicle, police said.
The driver of the vehicle that collided with the suspect vehicle was
transported to a local hospital with minor injuries.

Soto, who was not injured in the robbery, was eventually able to
free himself and drove to where the suspects had abandoned their vehicle. He
grabbed the marijuana and left, but a passing motorist gave police his
license plate and direction of travel, police said.

Soto was located driving in the area of Ninth Avenue and Fair Oaks
Avenue, and when the officer stopped his vehicle, Soto tried to run away but
was taken into custody, and the 50 pounds of marijuana was recovered from his
vehicle, according to police.

Investigators were able to identify the three suspects who
committed the robbery. Jose Mata Gutierrez, 25, and Oscar Tapia Carmona, 21,
were arrested at a home in the city just after midnight Thursday, police
said.

Martinez was arrested at a Redwood City apartment at about 8:15
p.m., according to police.

The four suspects were booked into San Mateo County Jail for a
variety of charges including robbery with a firearm, conspiracy, possession
of a firearm, assault with a deadly weapon, and possession and transportation
of marijuana.